NJS.HelloWorld = Class.extend({
	hello: function() {
		alert('hello');
		return 'hello';
	},
	world: function() {
		return 'world';
	}
});

NJS.SayHello = NJS.HelloWorld.extend({
	init: function(){
	},
	hello: function() {
		this._super();
	}
});

(function () {
	var hello = new NJS.SayHello();
})();